The latest version of Spectrotest from Spectro Analytical is a mobile OES spectrometer, which is capable of segregating Duplex steels by nitrogen content and measuring carbon in steels down to 0.1% without the need for argon flushing. A number of advances in technology have made this possible. The “Plasma Generator” totally digital spark control accurately defines and controls the energy in the plasma which improves performance. The sample probe is new too: it is lighter, slimmer and more convenient to use when space is restricted. A new scrubbing system improves optical performance to permit the measurement of carbon in low alloy steels in air. An optional probe, which can quickly be interchanged with the standard probes, permits the measurement of light elements such as N, P, S, Be and B. The system uses Spectro's ICAL, which monitors performance and automatically corrects for any calibration drift using a single control sample. For PMI, alloy grades are quickly identified against the instrument's internal libraries and the automatic programme finding function uses the measured spectrum to ensure that the best measurement parameters and programmes are used for the sample.

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